CPC National Collection Plant Profile

Hedeoma todsenii

Photographer:
Joyce Maschinski

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CPC National Collection Plant Profile

Hedeoma todsenii


Family: 
Lamiaceae  
Common Name: 
Todsen's pennyroyal
Author: 
Irving
Growth Habit: 
Subshrub, Forb/herb
CPC Number: 
2159

Distribution
Protection
Conservation
References


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Hedeoma todseniienlarge
Photographer: Joyce Maschinski
jmaschinski[at]fairchildgarden.org


Hedeoma todsenii is Fully Sponsored
Primary custodian for this plant in the CPC National Collection of Endangered Plants is: 
Joyce Maschinski, Ph.D. contributed to this Plant Profile.

 
Hedeoma todsenii


Todsen's pennyroyal is a rare mint that is found in south-central New Mexico. It is a perennial rhizomatous herb approximately 4 to 8 inches (10 to 20 cm) tall. The small, lance-shaped leaves are arranged oppositely along the stem. The tubular orange (or less frequently yellow) flowers open to two lips. Typical of plants in the mint family, the leaves of this species emit a distinctive fragrant odor.
Even though thousand of stems may occur at a site, the number of genetically distinct individuals is likely to be far less because of the tendency of the species to form clonal mats. Plants either do not form seed or form very little seed in the wild.

Distribution & Occurrence

State Range
  New Mexico
State Range of  Hedeoma todsenii
Habitat
  loose gypeous-limestone soils in pinyon- juniper woodlands at 6250 -6800 feet (1900 -2075 meters) elevation

Distribution
  Known from the San Andres and Sacramento mountain ranges in southern New Mexico in a total of 18 sites.

Number Left
  18 populations on federal lands in the San Andres and Sacramento Mountains of New Mexico

Protection

Global Rank:  
G2
 
1/1/1996
Guide to Global Ranks
Federal Status:  
LE
 
8/16/2001
Guide to Federal Status
Recovery Plan:  
Yes
 
3/22/1985

State/Area Protection
  State/Area Rank Status Date  
  New Mexico S1 12/21/1989  

Conservation, Ecology & Research

Ecological Relationships
  Plants grow in shady areas of pinyon-juniper woodlands associated with mountain mahogany, wavyleaf oak, snakeweed and muhly grass.

Threats
  Natural threats currently appear to be greater than threats from human activities, because populations are relatively inaccessible. Grazing by livestock and wild ungulates impacts plants, but drought is probably a more serious threat. Low genetic diversity also could be a threat.

Current Research Summary
  In an attempt to determine if genetic or pollination factors were limiting seed set in the wild, Huenneke (1993) did pollination and genetic studies of Todsen's pennyroyal, however the genetic results do not clearly explain patterns of poor seed set seen in the wild.

Current Management Summary
  Todsen's pennyroyal habitat on BLM-lands has been recommended for designation as an Area of Critical Environmental Concern. On USFS lands, the plant's habitat is not authorized for logging or fuelwood harvest and the grazing allotment has been withdrawn.

Research Management Needs
  More research is needed on factors responsible for low sexual reproduction.

Ex Situ Needs
  The species has been successfully propagated vegetatively through traditional and tissue-culture techniques, however because no or few seed is produced in the wild, plants can only be kept ex situ through vegetative propagation.

References

Books (Sections)

Kartesz, J.T. 1999. A synonymized checklist of the vascular flora of the U.S., Canada, and Greenland. In: Kartesz, J.T.; Meacham, C.A., editors. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden. Chapel Hill, NC.

Books (Edited Volumes)

New Mexico Native plants Protection Advisory Committee. 1984 A handbook of rare and endemic plants of New Mexico. Albuquerque, NM: University of New Mexico Press.

Conference Proceedings

Sivinski, R.; Knight, P. Narrow Endemism in the New Mexico Flora. Gen. Tech. Rep. RM-GTR-283. Proceedings of the Southwestern Rare and Endangered Plant Conference; September 11-14; Flagstaff, AZ. In: Maschinski, J.; Hammond, H.D.; Holter, L., editors. 1996. USDA and US Forest Service. p 286-296.

Electronic Sources

(1999). New Mexico Rare Plants Information. New Mexico Rare Plant Technical Council: Albuquerque, NM. Version 15. http://nmrareplants.unm.edu/nmrptc/rarelist.htm. Accessed: 2002.

Journal Articles

Epling, C.; Stewart, W.S. 1939. A revision of Hedeoma with a review of allied genera. Report Spec. Nov. Regni Veh. 115: 1-49.

Irving, R.S. 1979. Hedeoma todsenii (Labiatae), a new and rare species from New Mexico. Madroņo. 26: 184-187.

Irving, R.S. 1980. The systematics of Hedeoma (Labiatae). Sida. 8: 218-295.

USFWS. 1980. Proposed Rule to Determine Hedeoma todsenii (Todsens Penneyroyal) to be an Endangered Species and to Determine its Critical Habitat. Federal Register. 45, 145: 49858-49860.

USFWS. 1981. Determination of Two New Mexico Plants to be Endangered Species and Threatened Species, with Critical Habitat. Federal Register. 46, 12: 5730-5733.

USFWS. 1983. Regional Briefs-Region 2. Endangered Species Technical Bulletin. 8, 12: 2, 5.

Reports

Huenneke, L.F. 1993. Interaction of Breeding System and Genetic Structure in Hedeoma todsenii (Lamiaceae), a Rare Mint of New Mexico. Las Cruces, NM: Final Report to Center for Plant Conservation and New Mexico Division of Forestry. p.10. Final Report.

Irving, R.S. 1980. Status report from Hedeoma todsenii. U.S. Fish and Wildlife Service.

Sivinski, R.; Lightfoot, K. 1994. Todsen's pennyroyal performance report (E9). Albuquerque, New Mexico: U.S. Fish & Wildlife Service.

USFWS. 2000. Todsen's pennyroyal (Hedeoma todsenii R.S. Irving) revised recovery plan. Albuquerque: U.S. Fish & Wildlife Service, New Mexico Ecological Services Field Office.


  This profile was updated on 3/4/2010
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